allow parsing of just an offset

Author: icambron

package-lock.json

@@ -168,7 +168,7 @@ function adjustTime(inst, dur) {
 // by handling the zone options
 function parseDataToDateTime(parsed, parsedZone, opts, format, text, specificOffset) {
   const { setZone, zone } = opts;
-  if (parsed && Object.keys(parsed).length !== 0) {
+  if ((parsed && Object.keys(parsed).length !== 0) || parsedZone) {
     const interpretationZone = parsedZone || zone,
       inst = DateTime.fromObject(parsed, {
         ...opts,

src/datetime.js

@@ -837,6 +837,13 @@ test("DateTime.fromFormat containg special regex token", () => {
   ).toBe(false);
 });
 
+// #1362
+test("DateTime.fromFormat only an offset", () => {
+  const dt = DateTime.fromFormat("+0100", "ZZZ", { setZone: true });
+  expect(dt.isValid).toBe(true);
+  expect(dt.offset).toBe(60);
+});
+
 //------
 // .fromFormatExplain
 //-------